Embodiments of the present disclosure are directed to, among other things, monitoring a user device to determine whether a user associated with the device is safe. In some examples, a user (which may be referred to herein as an “initiator” establishes a device monitoring session (which may be referred to herein as “session”) with a user, or a group of users, so that the user(s) are notified either when the initiator has safely ended the device monitoring session or receives access to session data that was collected during the session. In some configurations, the session can be handed off from a first user device that is currently active to a different user device. Instead of the first user device always being the device that interacts with the server, a different first user device may be selected as the active device to interact with the server.